'\" te
.\" Copyright (c) 2006, Sun Microsystems, Inc.
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.TH DDI_DEV_NREGS 9F "Jan 16, 2006"
.SH NAME
ddi_dev_nregs \- return the number of register sets a device has
.SH SYNOPSIS
.nf
#include <sys/conf.h>
#include <sys/ddi.h>
#include <sys/sunddi.h>



\fBint\fR \fBddi_dev_nregs\fR(\fBdev_info_t *\fR\fIdip\fR, \fBint *\fR\fIresultp\fR);
.fi

.SH INTERFACE LEVEL
illumos DDI specific (illumos DDI).
.SH PARAMETERS
.ne 2
.na
\fB\fIdip\fR\fR
.ad
.RS 11n
A pointer to the device's \fBdev_info\fR structure.
.RE

.sp
.ne 2
.na
\fB\fIresultp\fR\fR
.ad
.RS 11n
Pointer to an integer that holds the number of register sets on return.
.RE

.SH DESCRIPTION
The \fBddi_dev_nregs()\fR function returns the number of sets of registers the
device has.
.SH RETURN VALUES
The \fBddi_dev_nregs()\fR function returns:
.sp
.ne 2
.na
\fB\fBDDI_SUCCESS\fR\fR
.ad
.RS 15n
A successful return. The number of register sets is returned in \fIresultp\fR.
.RE

.sp
.ne 2
.na
\fB\fBDDI_FAILURE\fR\fR
.ad
.RS 15n
The device has no registers.
.RE

.SH CONTEXT
The \fBddi_dev_nregs()\fR function can be called from user, interrupt, or
kernel context.
.SH SEE ALSO
.BR ddi_dev_nintrs (9F),
.BR ddi_dev_regsize (9F)
.sp
.LP
\fIWriting Device Drivers\fR
